1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/* ====================================================================
* Copyright (c) 2000 The Apache Software Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the Apache Software Foundation
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* 4. The names "Apache Server" and "Apache Software Foundation" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Software Foundation.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the Apache Software Foundation
* for use in the Apache HTTP server project (http://www.apache.org/)."
*
* THIS SOFTWARE IS PROVIDED BY THE Apache Software Foundation ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE Apache Software Foundation OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation.
* For more information on the Apache Software Foundation and the Apache HTTP server
* project, please see <http://www.apache.org/>.
*
*/
#include "apr_general.h"
#include "apr_lib.h"
#include "locks.h"
#include "fileio.h"
#include <string.h>
#define INCL_DOS
#include <os2.h>
#define CurrentTid (lock->tib->tib_ptib2->tib2_ultid)
void setup_lock()
{
}
static ap_status_t lock_cleanup(void *thelock)
{
struct lock_t *lock = thelock;
return ap_destroy_lock(lock);
}
ap_status_t ap_create_lock(struct lock_t **lock, ap_locktype_e type, ap_lockscope_e scope, char *fname, ap_context_t *cont)
{
struct lock_t *new;
ULONG rc;
char *semname;
PIB *ppib;
new = (struct lock_t *)ap_palloc(cont, sizeof(struct lock_t));
new->cntxt = cont;
new->type = type;
new->scope = scope;
new->owner = 0;
new->lock_count = 0;
new->fname = ap_pstrdup(cont, fname);
DosGetInfoBlocks(&(new->tib), &ppib);
if (fname == NULL)
semname = NULL;
else
semname = ap_pstrcat(cont, "/SEM32/", fname, NULL);
rc = DosCreateMutexSem(semname, &(new->hMutex), scope == APR_CROSS_PROCESS ? DC_SEM_SHARED : 0, FALSE);
*lock = new;
if (!rc)
ap_register_cleanup(cont, new, lock_cleanup, ap_null_cleanup);
return os2errno(rc);
}
ap_status_t ap_child_init_lock(ap_lock_t **lock, char *fname, ap_context_t *cont)
{
int rc;
PIB *ppib;
*lock = (struct lock_t *)ap_palloc(cont, sizeof(struct lock_t));
if (lock == NULL)
return APR_ENOMEM;
DosGetInfoBlocks(&((*lock)->tib), &ppib);
(*lock)->owner = 0;
(*lock)->lock_count = 0;
rc = DosOpenMutexSem( fname, &(*lock)->hMutex );
if (!rc)
ap_register_cleanup(cont, *lock, lock_cleanup, ap_null_cleanup);
return os2errno(rc);
}
ap_status_t ap_lock(struct lock_t *lock)
{
ULONG rc;
rc = DosRequestMutexSem(lock->hMutex, SEM_INDEFINITE_WAIT);
if (rc == 0) {
lock->owner = CurrentTid;
lock->lock_count++;
}
return os2errno(rc);
}
ap_status_t ap_unlock(struct lock_t *lock)
{
ULONG rc;
if (lock->owner == CurrentTid && lock->lock_count > 0) {
lock->lock_count--;
rc = DosReleaseMutexSem(lock->hMutex);
return os2errno(rc);
}
return APR_SUCCESS;
}
ap_status_t ap_destroy_lock(struct lock_t *lock)
{
ULONG rc;
ap_status_t stat = APR_SUCCESS;
if (lock->owner == CurrentTid) {
while (lock->lock_count > 0 && stat == APR_SUCCESS)
stat = ap_unlock(lock);
}
if (stat != APR_SUCCESS)
return stat;
if (lock->hMutex == 0)
return APR_SUCCESS;
rc = DosCloseMutexSem(lock->hMutex);
if (!rc)
lock->hMutex = 0;
return os2errno(rc);
}
|
